/* [Previous CSS remains exactly the same] */      :root {
            --primary: #4361ee;
            --primary-dark: #3a56d4;
            --secondary: #3f37c9;
            --accent: #4895ef;
            --accent-dark: #3d7ec7;
            --danger: #f72585;
            --success: #4cc9f0;
            --warning: #f8961e;
            
            /* Light theme */
            --bg-light: #f8f9fa;
            --text-light: #212529;
            --card-light: #ffffff;
            --border-light: #e9ecef;
            --shadow-light: rgba(0, 0, 0, 0.1);
            
            /* Dark theme */
            --bg-dark: #121212;
            --text-dark: #e1e1e1;
            --card-dark: #1e1e1e;
            --border-dark: #2d2d2d;
            --shadow-dark: rgba(0, 0, 0, 0.3);
            
            /* Current theme variables */
            --bg: var(--bg-light);
            --text: var(--text-light);
            --card: var(--card-light);
            --border: var(--border-light);
            --shadow: var(--shadow-light);
        }
        
        .dark-mode {
            --bg: var(--bg-dark);
            --text: var(--text-dark);
            --card: var(--card-dark);
            --border: var(--border-dark);
            --shadow: var(--shadow-dark);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            transition: background-color 0.3s, color 0.3s, border-color 0.3s;
        }
        
        body {
            font-family: 'Poppins', sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header Styles */
        header {
            padding: 20px 0;
            background-color: var(--card);
            box-shadow: 0 2px 10px var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 10px;
            font-size: 28px;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            align-items: center;
        }
        
        .nav-links li {
            margin-left: 25px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--text);
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .btn {
            display: inline-block;
            padding: 10px 20px;
            background-color: var(--primary);
            color: white;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
        }
        
        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.2);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        
        .btn-outline:hover {
            background-color: var(--primary);
            color: white;
        }
        
        .btn-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        /* Theme Toggle */
        .theme-toggle {
            background: none;
            border: none;
            color: var(--text);
            font-size: 1.2rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            transition: all 0.3s;
        }
        
        .theme-toggle:hover {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--primary);
        }
        
        /* Hero Section */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            overflow: hidden;
            padding: 100px 0;
            background-color: var(--bg);
        }
        
        .hero-content {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        
        .hero h1 {
            font-size: 3.8rem;
            margin-bottom: 20px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: fadeInUp 1s ease;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 40px;
            color: var(--text);
            opacity: 0.9;
            animation: fadeInUp 1s ease 0.2s forwards;
            opacity: 0;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .url-form {
            display: flex;
            max-width: 700px;
            margin: 0 auto 40px;
            animation: fadeInUp 1s ease 0.4s forwards;
            opacity: 0;
            gap: 10px;
        }
        
        .url-input {
            flex: 1;
            padding: 18px 25px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 1.05rem;
            outline: none;
            transition: border-color 0.3s, box-shadow 0.3s;
            background-color: var(--card);
            color: var(--text);
        }
        
        .url-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        
        .url-input::placeholder {
            color: var(--text);
            opacity: 0.6;
        }
        
        .submit-btn {
            padding: 18px 35px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 1.05rem;
            white-space: nowrap;
        }
        
        .submit-btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
        }
        
        .result-container {
            margin-top: 30px;
            animation: fadeIn 0.5s ease;
            background-color: var(--card);
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 5px 20px var(--shadow);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .result-box {
            display: flex;
            gap: 15px;
            align-items: center;
        }
        
        .result-url {
            flex: 1;
            padding: 15px;
            font-size: 1.05rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            background-color: var(--bg);
            color: var(--text);
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .copy-btn {
            padding: 15px 25px;
            background-color: var(--accent);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            white-space: nowrap;
        }
        
        .copy-btn:hover {
            background-color: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(72, 149, 239, 0.3);
        }
        
        .analytics-link {
            margin-top: 15px;
            text-align: center;
        }
        
        .analytics-link a {
            color: var(--accent);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .analytics-link a:hover {
            color: var(--accent-dark);
            text-decoration: underline;
        }
        
        /* Animation Elements */
        .link-animation {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 1;
            overflow: hidden;
            opacity: 0.5;
        }
        
        .link-node {
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: rgba(67, 97, 238, 0.15);
            border-radius: 50%;
            animation: float 15s infinite linear;
        }
        
        .link-line {
            position: absolute;
            background-color: rgba(67, 97, 238, 0.1);
            transform-origin: left center;
            animation: extend 8s infinite ease-in-out;
        }
        
        /* Stats Section */
        .stats {
            padding: 100px 0;
            background-color: var(--card);
        }
        
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .stat-card {
            background-color: var(--bg);
            padding: 40px 30px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 5px 20px var(--shadow);
            transition: all 0.4s;
            border: 1px solid var(--border);
        }
        
        .stat-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px var(--shadow);
        }
        
        .stat-number {
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 15px;
            font-feature-settings: "tnum";
        }
        
        .stat-label {
            font-size: 1.15rem;
            color: var(--text);
            opacity: 0.8;
        }
        
        /* Features Section */
        .features {
            padding: 100px 0;
            background-color: var(--bg);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.8rem;
            color: var(--text);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .section-title p {
            color: var(--text);
            opacity: 0.8;
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        .features-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: var(--card);
            padding: 40px 30px;
            border-radius: 15px;
            box-shadow: 0 5px 20px var(--shadow);
            transition: all 0.4s;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px var(--shadow);
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
        }
        
        .feature-icon {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 25px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .feature-card h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: var(--text);
        }
        
        .feature-card p {
            color: var(--text);
            opacity: 0.8;
            line-height: 1.7;
        }
        
        /* Testimonials Section */
        .testimonials {
            padding: 100px 0;
            background-color: var(--card);
        }
        
        .testimonial-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .testimonial-card {
            background-color: var(--bg);
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 5px 20px var(--shadow);
            border: 1px solid var(--border);
            position: relative;
        }
        
        .testimonial-card .quote {
            font-size: 3rem;
            color: var(--primary);
            opacity: 0.2;
            position: absolute;
            top: 10px;
            right: 20px;
        }
        
        .testimonial-content {
            margin-bottom: 20px;
            color: var(--text);
            opacity: 0.9;
            font-style: italic;
            line-height: 1.7;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--primary);
        }
        
        .author-info h4 {
            color: var(--text);
            margin-bottom: 5px;
        }
        
        .author-info p {
            color: var(--text);
            opacity: 0.7;
            font-size: 0.9rem;
        }
        
        /* CTA Section */
        .cta {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path fill="rgba(255,255,255,0.05)" d="M0,0 L100,0 L100,100 L0,100 Z"></path></svg>');
            background-size: cover;
            opacity: 0.1;
        }
        
        .cta h2 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            position: relative;
        }
        
        .cta p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 40px;
            opacity: 0.9;
            position: relative;
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            position: relative;
        }
        
        .cta .btn {
            background-color: white;
            color: var(--primary);
            font-weight: 600;
            padding: 15px 30px;
            border-radius: 10px;
        }
        
        .cta .btn-outline {
            background-color: transparent;
            border: 2px solid white;
            color: white;
        }
        
        .cta .btn-outline:hover {
            background-color: white;
            color: var(--primary);
        }
        
        /* Footer */
        footer {
            background-color: var(--card);
            color: var(--text);
            padding: 80px 0 30px;
            border-top: 1px solid var(--border);
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: var(--text);
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 3px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: var(--text);
            opacity: 0.8;
            text-decoration: none;
            transition: all 0.3s;
            display: inline-block;
        }
        
        .footer-links a:hover {
            color: var(--primary);
            opacity: 1;
            transform: translateX(5px);
        }
        
        .footer-about p {
            color: var(--text);
            opacity: 0.8;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--bg);
            color: var(--text);
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid var(--border);
            color: var(--text);
            opacity: 0.7;
            font-size: 0.95rem;
        }
        
        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        
        @keyframes float {
            0% {
                transform: translateY(0) translateX(0);
            }
            50% {
                transform: translateY(-100px) translateX(50px);
            }
            100% {
                transform: translateY(0) translateX(0);
            }
        }
        
        @keyframes extend {
            0% {
                transform: scaleX(0);
                opacity: 0;
            }
            50% {
                transform: scaleX(1);
                opacity: 0.3;
            }
            100% {
                transform: scaleX(0);
                opacity: 0;
            }
        }
        
        /* Tooltip */
        .tooltip {
            position: relative;
            display: inline-block;
        }
        
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 120px;
            background-color: var(--card);
            color: var(--text);
            text-align: center;
            border-radius: 6px;
            padding: 5px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -60px;
            opacity: 0;
            transition: opacity 0.3s;
            box-shadow: 0 5px 15px var(--shadow);
            border: 1px solid var(--border);
            font-size: 0.9rem;
        }
        
        .tooltip .tooltiptext::after {
            content: "";
            position: absolute;
            top: 100%;
            left: 50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: var(--card) transparent transparent transparent;
        }
        
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        
        /* Responsive */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 3rem;
            }
            
            .section-title h2 {
                font-size: 2.4rem;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 20px;
            }
            
            .nav-links {
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .nav-links li {
                margin: 0 10px 10px;
            }
            
            .hero {
                padding: 80px 0;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .url-form {
                flex-direction: column;
            }
            
            .url-input {
                width: 100%;
                margin-bottom: 10px;
            }
            
            .submit-btn {
                width: 100%;
            }
            
            .result-box {
                flex-direction: column;
            }
            
            .result-url {
                width: 100%;
                margin-right: 0;
                margin-bottom: 15px;
            }
            
            .copy-btn {
                width: 100%;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .cta h2 {
                font-size: 2.2rem;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }
        
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .feature-card {
                padding: 30px 20px;
            }
            
            .stats-container {
                grid-template-columns: 1fr;
            }
        }
        
        /* Add error message styling */
        .error-message {
            color: var(--danger);
            background-color: rgba(247, 37, 133, 0.1);
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            text-align: center;
            animation: fadeIn 0.3s ease;
        }